Detroit police have arrested four people in the robbery and killing of a French street artist whose body was found in the ruins of an abandoned public housing project last year, authorities said Wednesday.

Police didn't violate the First Amendment when they threatened to ticket Christian evangelists at an Arab-American street festival in suburban Detroit, a federal appeals court said Wednesday in a 2-1 decision that drew a pointed dissent from a judge who called it a "blueprint" to stifle speech.

A lawyer urged a judge Thursday to order Michigan to recognize hundreds of same-sex marriages performed during a brief window in March, saying the unions were valid even if a higher court eventually reinstates the state's ban on gay marriage.

A suburban Detroit man who insisted he killed an unarmed woman on his porch in self-defense was convicted of second-degree murder Thursday after the jury rejected his tearful claim that he fired through a screen door in the wee hours because he feared his life was at risk.

A suburban Detroit man said Monday that he was afraid when someone showed up on his porch before dawn one morning last year and started banging on his doors, but he wasn't going to be a victim in his own home.